Method of forming watchcase-bows.



J,- ULLBERG & B. LEVY.

METHOD OF FORMING WATGHGASE BOWS.

APPLICATION FILED MAY 3. 1909.

' 9%,0s2. Patented Jan. 11, 1910.

T52 J m v w TNESSES INVENTORJ g fafi 6 W ATTORNEY UNITED STATES PATENT oriuon.

JOHN ULLBERG AND BERNARD LEVY, 0F RIVERSIDE, NEW JERSEY, ASSIGNORS TO PHILADELPHIA WATCH CASE COMPANY, OF RIVERSIDE, NEW JERSEY, A CORPO- RATION OF NEW JERSEY.

METHOD OF FORMING WATCHCASE-BOWS.

To all whom it may concern:

Be it known that we, JOHN ULLBERG and BERNARD LEVY, citizens of the United States, and residents of Riverside, county of Burlington, and State of New Jersey, have made and invented certain new and useful Improvements in Methods of Forming \VatchcaseBows, of which the following is a specification.

Our invention relates to a method of forming watch case bows, and more particularly to what is known and commonly termed by the trade as a Swiss how, that is, a bow comprising a bow proper and a bar formed on each of its two free ends.

Heretofore it has been the practice to devise a method whereby to construct these bows of solid gold, or from solid gold wire, even though intended to form a part of, or be employed in connection with watch cases made of plated or filled gold, as it has thus far been found impossible to construct them of filled gold, or of filled gold wire and provided with an unbroken outer coating, covering or envelop of gold or precious metal, the outer ends of the horizontal bars being left raw, and exposing to view the base metal of which the bow was partially made.

The object of our invention is to construct a bow of this character of filled gold, or gold filled wire, having its entire outer surface covered or protected with a continuous or unbroken outer skin of precious metal, with the exception of the extreme ends of the bow which are contained within and concealed by the watch case pendant with which the bow is assembled in the completed watch case, and with such and other ends in view, the invention consists of the method of forming the same, as hereinafter described and specifically pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in elevation of a piece of gold filled wire from which the bow is constructed. Fig. 2 shows the result of the first operation. Fig. 3 shows the result of the second operation wherein the metal is coaxed or partially struck up into the form of ears. Fig. 4 is a similar view showing the result of the third operation, and whereby the ears are struck up half full. Fig. 5 shows the result of the next operation, whereby the ears are completely formed. Fig. 6 shows the result Specification of Letters Patent.

Application filed May 3, 1909.

Patented Jan. 11, 1910.

Serial No. 493,509.

of the next operation, whereby the excessive metal at the ends of the bow is cut away. Fig. 7 shows the bow bent into final shape. Fig. 8 shows the bow after being planished and stiffened. Fig. 9 is a sectional view taken on the line 99 of Fig. 7. Fig. 10 is a similar view of the same taken on the line 10-10 of Fig. 8.

As before described, our improved bow is constructed from a piece of gold filled wire, A, of proper length, and suitable diameter, and which is bent into the form of a bow B, as illustrated in Fig. 2. By means of suitable dies, the metal comprising the ends of the bow is gradually forced backward to form the slight projections G, as illustrated in Fig. 3, then into the partially formed ears D, as illustrated in Fig. 4, and finally into the completely formed ears E, illustrated in Fig. 5, these several operations somewhat enlarging the extreme ends of the wire, as illustrated at F. These enlarged ends are then cut off, as illustrated in Fig. 6, thereby completing the formation of the bars G, which as well as the wire or bow proper A, are completely protected and covered by an unbroken outer skin or covering of precious metal, with the exception of the extreme ends H. The bow is then bent into proper form, as illustrated in Fig. 7, having the cross section as illustrated in Fig. 9. If

desired, the bow is then given the cross section as illustrated at A, Figs. 8 and 10, or any other desired shape in cross section to harmonize with the style or decoration of the watch case with which it is to be employed.

By the above described method we are enabled to produce a Swiss bow from gold filled wire having all those parts or portions exposed to view covered or protected byan unbroken outer skin of precious metal, and having the same shape and contour and the same appearance as that made from solid gold wire. Furthermore, the method is an extremely simple and economical one and may be employed in the manufacture of bows made from solid, as well as from filled metal.

Having fully described our invention, what we claim as new and desire to secure by Letters Patent, is v 1. The hereinabove described method of forming watch case bows, consisting in bending a single piece of wire into the form of a bow, then gradually upsetting the ends of said bow whereby to form bars, and finally bending said wire into the shape of a finished bow.

2. The method hereinbefore described of forming watch case bows, consisting in bending a piece of wire into the shape of a bow, then upsetting the ends of said bow to form bars thereon, removing the enlarged or upset ends of said bars, and finally bending the wire into the shape of a finished bow.

3. The method hereinbefore described of forming watch case bows, consisting in bending a piece of gold filled wire into the form of a bow, then upsetting each end of said bow to form a bar thereon, each of said bars merging into the bow about midway its length, then removing the inner upset ends of said bars, and finally bending the wire into the shape of a finished bow.

Signed at Riverside, in the county of Burlington and State of New Jersey, this 27 day of April A. D. 1909.

JOHN ULLBERG. BERNARD LEVY. lVitnesses FRANK J. FEUSSNER, J. HANNING. 

